heap-object-inl.h

// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_OBJECTS_HEAP_OBJECT_INL_H_
#define V8_OBJECTS_HEAP_OBJECT_INL_H_

#include "src/objects/heap-object.h"

#include "src/heap/heap-write-barrier-inl.h"

// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"

namespace v8 {
namespace internal {

#define TYPE_CHECK_FORWARDER(Type)                       \
  bool ObjectPtr::Is##Type() const {                     \
    return reinterpret_cast<Object*>(ptr())->Is##Type(); \
  }
HEAP_OBJECT_TYPE_LIST(TYPE_CHECK_FORWARDER)
TYPE_CHECK_FORWARDER(LayoutDescriptor);
TYPE_CHECK_FORWARDER(Primitive);
TYPE_CHECK_FORWARDER(Number);
TYPE_CHECK_FORWARDER(Numeric);
#undef TYPE_CHECK_FORWARDER

#define TYPE_CHECK_FORWARDER(NAME, Name, name)           \
  bool ObjectPtr::Is##Name() const {                     \
    return reinterpret_cast<Object*>(ptr())->Is##Name(); \
  }
STRUCT_LIST(TYPE_CHECK_FORWARDER)
#undef TYPE_CHECK_FORWARDER

#define TYPE_CHECK_FORWARDER(Type, Value)                       \
  bool ObjectPtr::Is##Type(Isolate* isolate) const {            \
    return reinterpret_cast<Object*>(ptr())->Is##Type(isolate); \
  }                                                             \
  bool ObjectPtr::Is##Type(ReadOnlyRoots roots) const {         \
    return reinterpret_cast<Object*>(ptr())->Is##Type(roots);   \
  }                                                             \
  bool ObjectPtr::Is##Type() const {                            \
    return reinterpret_cast<Object*>(ptr())->Is##Type();        \
  }
ODDBALL_LIST(TYPE_CHECK_FORWARDER)
#undef TYPE_CHECK_FORWARDER

bool ObjectPtr::IsHashTableBase() const { return IsHashTable(); }

bool ObjectPtr::IsSmallOrderedHashTable() const {
  return IsSmallOrderedHashSet() || IsSmallOrderedHashMap() ||
         IsSmallOrderedNameDictionary();
}

double ObjectPtr::Number() const {
  return reinterpret_cast<Object*>(ptr())->Number();
}

bool ObjectPtr::ToInt32(int32_t* value) const {
  return reinterpret_cast<Object*>(ptr())->ToInt32(value);
}

bool ObjectPtr::ToUint32(uint32_t* value) const {
  return reinterpret_cast<Object*>(ptr())->ToUint32(value);
}

bool ObjectPtr::FilterKey(PropertyFilter filter) {
  return reinterpret_cast<Object*>(ptr())->FilterKey(filter);
}

Object* ObjectPtr::GetHash() {
  return reinterpret_cast<Object*>(ptr())->GetHash();
}

bool ObjectPtr::ToArrayIndex(uint32_t* index) const {
  return reinterpret_cast<Object*>(ptr())->ToArrayIndex(index);
}

void ObjectPtr::ShortPrint(FILE* out) {
  return reinterpret_cast<Object*>(ptr())->ShortPrint(out);
}

void ObjectPtr::Print() { reinterpret_cast<Object*>(ptr())->Print(); }

void ObjectPtr::Print(std::ostream& os) {
  reinterpret_cast<Object*>(ptr())->Print(os);
}

OBJECT_CONSTRUCTORS_IMPL(HeapObjectPtr, ObjectPtr)
HeapObjectPtr::HeapObjectPtr(Address ptr, AllowInlineSmiStorage allow_smi)
    : ObjectPtr(ptr) {
  SLOW_DCHECK(
      (allow_smi == AllowInlineSmiStorage::kAllowBeingASmi && IsSmi()) ||
      IsHeapObject());
}

#define TYPE_CHECK_FORWARDER(Type)                           \
  bool HeapObjectPtr::Is##Type() const {                     \
    return reinterpret_cast<HeapObject*>(ptr())->Is##Type(); \
  }
HEAP_OBJECT_TYPE_LIST(TYPE_CHECK_FORWARDER)
#undef TYPE_CHECK_FORWARDER

Map HeapObjectPtr::map() const {
  return Map::cast(READ_FIELD(this, kMapOffset));
}

void HeapObjectPtr::set_map(Map value) {
  reinterpret_cast<HeapObject*>(ptr())->set_map(value);
}

void HeapObjectPtr::set_map_no_write_barrier(Map value) {
  reinterpret_cast<HeapObject*>(ptr())->set_map_no_write_barrier(value);
}

void HeapObjectPtr::set_map_after_allocation(Map value, WriteBarrierMode mode) {
  reinterpret_cast<HeapObject*>(ptr())->set_map_after_allocation(value, mode);
}

ObjectSlot HeapObjectPtr::map_slot() {
  return ObjectSlot(FIELD_ADDR(this, kMapOffset));
}

MapWord HeapObjectPtr::map_word() const {
  return MapWord(RELAXED_READ_FIELD(this, kMapOffset).ptr());
}

void HeapObjectPtr::set_map_word(MapWord map_word) {
  RELAXED_WRITE_FIELD(this, kMapOffset,
                      reinterpret_cast<Object*>(map_word.value_));
}

void HeapObjectPtr::synchronized_set_map(Map value) {
  if (!value.is_null()) {
#ifdef VERIFY_HEAP
    Heap::FromWritableHeapObject(this)->VerifyObjectLayoutChange(*this, value);
#endif
  }
  synchronized_set_map_word(MapWord::FromMap(value));
  if (!value.is_null()) {
    // TODO(1600) We are passing kNullAddress as a slot because maps can never
    // be on an evacuation candidate.
    MarkingBarrier(this, ObjectSlot(kNullAddress), value);
  }
}

void HeapObjectPtr::synchronized_set_map_word(MapWord map_word) {
  RELEASE_WRITE_FIELD(this, kMapOffset,
                      reinterpret_cast<Object*>(map_word.value_));
}

WriteBarrierMode HeapObjectPtr::GetWriteBarrierMode(
    const DisallowHeapAllocation& promise) {
  Heap* heap = Heap::FromWritableHeapObject(this);
  if (heap->incremental_marking()->IsMarking()) return UPDATE_WRITE_BARRIER;
  if (Heap::InNewSpace(*this)) return SKIP_WRITE_BARRIER;
  return UPDATE_WRITE_BARRIER;
}

ReadOnlyRoots HeapObjectPtr::GetReadOnlyRoots() const {
  // TODO(v8:7464): When RO_SPACE is embedded, this will access a global
  // variable instead.
  return ReadOnlyRoots(MemoryChunk::FromHeapObject(*this)->heap());
}

int HeapObjectPtr::Size() const {
  return reinterpret_cast<HeapObject*>(ptr())->Size();
}
int HeapObjectPtr::SizeFromMap(Map map) const {
  return reinterpret_cast<HeapObject*>(ptr())->SizeFromMap(map);
}

ObjectSlot HeapObjectPtr::RawField(int byte_offset) const {
  return ObjectSlot(FIELD_ADDR(this, byte_offset));
}

MaybeObjectSlot HeapObjectPtr::RawMaybeWeakField(int byte_offset) const {
  return MaybeObjectSlot(FIELD_ADDR(this, byte_offset));
}

Address HeapObjectPtr::GetFieldAddress(int field_offset) const {
  return FIELD_ADDR(this, field_offset);
}

Heap* NeverReadOnlySpaceObjectPtr::GetHeap(const HeapObjectPtr object) {
  MemoryChunk* chunk = MemoryChunk::FromAddress(object.ptr());
  // Make sure we are not accessing an object in RO space.
  SLOW_DCHECK(chunk->owner()->identity() != RO_SPACE);
  Heap* heap = chunk->heap();
  SLOW_DCHECK(heap != nullptr);
  return heap;
}

Isolate* NeverReadOnlySpaceObjectPtr::GetIsolate(const HeapObjectPtr object) {
  return GetHeap(object)->isolate();
}

}  // namespace internal
}  // namespace v8

#include "src/objects/object-macros-undef.h"

#endif  // V8_OBJECTS_HEAP_OBJECT_INL_H_